NEED U HELP:how to get the difference in temperature between two wall boundaries?
 

Hi, all, i got a problem need u help.
As the attached shows, i want to get the temperature difference between two parallel solid walls, id=7 and 18 respectively.
I try to use UDMI to get the temperature on one wall/nearby fluid, but how can i pass the value to the other side?
Plz help me, Thanks...

Do you want to calculate a conduction between fluid-solid-fluid? Use a coupled wall boundary condition (use search for guidelines, or user guide).

Thanks Geisel. i knew the coupled wall boundary and have already used in my models.
there is a mass transfer cross the wall, i want to calculate the additional heat transfer coursed by the mass transfer. the additional heat flux can be writen as: N=k*(T_f - T_p). T_f & T_p are temperature on both sides of wall respectively. how can i get the T_f's thread and T_p's thread together? that is my problem.

Hallo oldfreshman

To get the temperature on the wall you can use this two command

t = Lookup_Thread(domain,your_surface_ID);
T=F_T(f,t)

i hope it was helpful.

Ciao

Thanks Friedmann.